NCERT Physics Class 12 Exemplar Chapter 1 Electric Charges and Fields Part 2

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Q.3 The Electric flux through the surface

Electric flux through surface

Electric Flux through Surface

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  1. In Fig. (iv) is the largest.

  2. In Fig. (iii) is the least.

  3. In Fig. (ii) is same as Fig. (iii) but is smaller than Fig. (iv)

  4. Is the same for all the figures.

Answer: D

Q.4 Five charges are fixed at their positions as shown in Fig. S is a Gaussian surface. The Gauss’s law is given by

Guassian surface

Guassian Surface

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Which of the following statements is correct?

  1. on the LHS of the above equation will have a contribution from while q on the RHS will have a contribution from only.

  2. on the LHS of the above equation will have a contribution from all charges while q on the RHS will have a contribution from only.

  3. on the LHS of the above equation will have a contribution from all charges while q on the RHS will have a contribution from only.

  4. Both on the LHS and on the RHS will have contributions from only.

Answer: B